National Dental Examining Board of Canada (NDEB) Practice Exam 2025 - Free NDEB Practice Questions and Study Guide

Question: 1 / 400

During CPR, external chest compression of an adult male should be how many cm?

2-3cm

4-5cm

During CPR, it is recommended to compress the chest of an adult male between 4-5cm. Options A and C (2-3cm and 5-6cm respectively) are too shallow and may not provide sufficient blood flow to the heart and brain. Option D (6-7cm) is too deep and may cause rib fractures or damage to internal organs. Therefore, option B (4-5cm) is the most appropriate depth for chest compressions during CPR on an adult male.

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5-6cm

6-7cm

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